Protection of Electrical Networks

General structure of the private distribution network

Generally, with an HV power supply, a private distribution network comprises (see Figure 1-1):

Figure 1-1: Structure of a private distribution network

• An HV consumer substation fed by one or more sources and made up of one or more busbars and circuit-breakers;
• An internal generation source;
• One or more HV/MV transformers;
• A main MV switchboard made up of one or more busbars;
• An internal MV network feeding secondary switchboards or MV/LV substations;
• MV loads;
• MV/LV transformers;
• Low voltage switchboards and networks;